*warning before reading this post*
i usually have too much to say.
this is also just one guy out there doing his best to help you out, and should not be taken as the only information to listen to.
and away we go....
<- Buying A New Bike ->
first up, have a read of the 'buying a bike' article in the latest copy of Australian Mountain Bike magazine. it covers just about every aspect of mountain biking and their different shapes and sizes, without going too much into random technical details. this will help you figure out what you want to do with your new toy, and what sort of new toy to get.
oh yeah the guy who wrote the article is Mike Shaw, chief Red Bull Ride course designer and all-round good bloke, who works as a professional mechanic at the same shop i do. the man knows his stuff.
most of what everyone else has said on this page is spot on, although i will also say DON'T go with the 'stick to Giant' idea.
have a bit of a look around first, see what's out there. It may well turn out that a Giant is the best bike at that price, but you might find something better too.
posting a message here was a good move - this will give you the thoughts and comments of 'normal people', and most of us seem to know what we're on about, as opposed (on a small number of occasions) to a salesperson in a shop who can't wait to get rid of a bike that might have been sitting there for 6 months.
and yeah, that'd include me, i work in a bike shop. guilty as charged...
as mentioned by Wombat - take someone who knows stuff to the bike shop with you. they'll be able to translate the technical ramblings of us salespeople into normal ideas that you can understand, and be able to tell if they're trying sell you a slightly scratched Huffy with shiny stickers on it.
having said that, most salespeople these days are quite capable of speaking normally, and will do a good job of sorting you out with the best bike for your money and abilities.
what you'll probably find, once you've gone around to a shop or three, talked to a few people, read all the stuff on this page (and figured out what the hell i'm on about), is that you've boiled everything down into a list of maybe two or three bikes.
on that list, you've probably got a bike with good bits and an average frame, and another with a pretty beefy frame and average bits, both for the same sort of price. so which one do you get?
most of the bits and pieces on bikes in your budget are going to be pretty close in quality, so go for the bike with the better frame. it's going to stand up to a bit more use and abuse.
without trying to scare ya off, at some stage, you're going to crash and bust a part of your bike,
(it happens to just about everyone), and a broken brake lever is a fair bit cheaper to replace than a broken frame...
going for a new rig is also going to get you good advice from people who spend the best part of their day playing with bikes, a warranty on the frame (this is a major plus), some free servicing from the shop you buy it from, and maybe the odd discount on upgrading stuff later on...
not to mention a new bunch of local mates to go riding with.
and the shiny new toy factor is always good.
<- Second Hand Bikes ->
this can be a bit of a hazy area, and will include some bikes that seem like awesome bargains.
some of them will be genuine, but a few are also going to be either thrashed to within an inch of their life, and might have some cracks in the frame, or possibly have been stolen. it's not very nice, but it does happen.
having said that, just about every bike i've seen on this site's For Sale section is worth looking at. (i want a few of them myself :mrgreen:.) being able to talk to the owner (who will obviously be a real rider and not Joe BikeThief) will also give you the benefit of knowing what sort of life the bike's had, what sort of condition it's in, and how it handles doing different things.
<- So What Am I Supposed To Do With Dicky's Ramblings? ->
well, as much or as little as you like. up to you my friend.
whatever you go with, find out as much information as you can before you give your money to someone.
one last thing... welcome to this crazy sport mate. it's a hell of a lot of fun, no matter what sort of bike or skills you've got.
see you out on the trail somewhere :mrgreen: