I'm looking to get a handheld ebookreader, and wondering if the folks here could throw personal views on the best to aim for. I'm after something that just reads ebooks, don't care about all the other pda tricks and tools. Ideally colour and light, though if the kit was good enough it's not essential. I'll be mainly reading pdf's so compatibility is pretty much essential, also around 4-8mb of memory with ideally an mmc expansion slot. Any suggestions?