The reason why I advise you to get a 2nd hand body is due to ther are some very good offer.
e.g
http://www.clubsnap.com/forums/threads/909994-WTSell-DSLR-Canon-450D
It costs less than the A290 and it is definitely a better model than a290.
In 2 to 3 month times, when you decide to upgrade or quit, you can still sell it around the same price you bought.
If you buy a a290, now and 3 month down the road, you want to upgrade, the market value will be likely to be less than $500.
Just bring a long an expert with you to check, and do remember, once you stick to a brand, it will be very costly to jump ship.
p/s I'm not related to that seller. just use it as an example.