If there is ANY way of getting a boradband connection, do it. This modem thing seems like the perfect excu.. Err, I mean, justification.. Reason.. You NEED broad band cause your modem no longer works. There ya go!
Seriously. I would (I think) rather be shot in the foot than go back to dialup. It's just not worth it. If you MUST have a dialup connection, get a satalite uplink for DL and just use the dialup for upload.
I use Cable. Don't know the exact bitrate off the top of my head, but it's about 480kbps up, 1.6mbps down. 30 bucks a month. And I bought my cable modem (Toshiba PCX1000) for about 230 bucks. Add about 75 bucks for a 3COM 10/100 card, and maybe 60 bucks for installation. It's really not that expensive, and it is WELL worth the money. (prices in canadian dollars)
I was recently in the market for a new appartment. My first priority was finding a low crime area (can't abide getting mugged at ATMs :/ ) Second priority was that the area had to support some sort of broadband access. I simply would not want to live somewhere where I was required to use dialup die to lack of other service.
There is a lot of talk in these forums about all kinds of great motherboards, ram, processors. One overlooked but very important aspect of owning a PC is insuring the best possible net connection. Even if all you do is use your computer for MS Word. You still need to download micrsoft security updates and patches every 10 minutes. With a modem, you don't even get one downloaded before the newer one is on the site!
I know I am rambling on about this, but I simply can not stress how much more enjoyable a PC is with a good broadband connection.
Eh, if you have read this far, and still want the dial up, you can't go wrong with US Robotics. Best out there. Get 56k V90. Look around, there are numerous models with various prices and features (voice, fax, internet call management, etc.)