I played with the Samsung Tablet the other day - miles better than the iPad for just about all my requirements - but still way too expensive for what it is.
.. or to put it another way, with the 'tablet' concept still evolving so fast, it doesn't make sense to me to splash out £499 when there will be FAR better options available in 3 or 4 months.
Something at $145 does seem more sensible - as long as it performs, and the reviews of the Archos do seem to suggest that is far better than those cheap chinese clones punted out through eBay.
After all, it will satisfy the most common tablet usage requirements, surfing from the sofa and surfing whilst taking a dump (not me, I don't have one, I just did a survey of tablet users)