I had this dilema already, had the Archos 101 and it's not a bad little machine and well priced and runs flash, handy for streaming.. I ended up getting a 1st gen used Ipad though and it's a super smooth and much more solid tablet. No comparison in terms of quality.
Would not touch the 7" with a barge pole, horrible screen/touch quality and slow as a mule.
A well looked after IPAD could be got for under €300, they run super cool and like all Apple products are built to last, the resell value on them also holds up very well if you look after them and keep a cover on it.