I installed a Canon LIDE30 for a client recently, and was very impressed.
Personally I have an HP scanner, but have seen some reliability problms with the entry level products.
I also installed (at a clients request) an Epson scanner recently - and was VERY unimpressed with the software - aprticularly the "scan to email" which we just couldn't get to do what was needed. Whereas the Canon worked ideally first time.
The Canon LIDE range are very good. I have a Lide 20. They work off the USB so don't need separate power. Try the link to Dealtime that byfordr has flagged. Select your price range, and/or manufacturer and browse.
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