the 4.4 cu ft Frigidaire available at Lowe's has been converted lately by a few of us (including me). You can put a tower or door faucet on it, despite this fridge having a freezer compartment.
Go check out that thread in the DIY section of this forum and you'll see some good pics of people's conversions. This fridge can be had for less than $200 (including tax) and is quite easy to convert.
Good luck
Cheers.