PS3 Recommendations

I'm looking to buy a PS3, but with all the hard drive sizes and whatever other options there are, I'm lost. Last system I bought was... crap, I don't know, so I've never really had to think about it. I inherited a PS2, which is what I use now, but I don't play online so I don't know how that works.
Anyway, here's what I'm asking. What do I look for? What hard drive size is big enough but won't destroy my wallet? I imagine 60 gigs is well enough (my computer hard drive isn't much bigger!), but with 250 gigs and all the other sizes available... is a drive size that big really necessary? With games today, would 60 gigs not be enough? What else are hard drives for except for saved games? What prices are good store prices, and what are great steals? How do I get online with this thing, and what are the monthly costs of getting onto a PS3 network? What other options are there? How can I get the data off my PS2 memory card onto a PS3 one? Are they reliable?
I'm not looking for an Xbox or a Wii or anything. I'm just shopping around for a PS3.
Anyway, here's what I'm asking. What do I look for? What hard drive size is big enough but won't destroy my wallet? I imagine 60 gigs is well enough (my computer hard drive isn't much bigger!), but with 250 gigs and all the other sizes available... is a drive size that big really necessary? With games today, would 60 gigs not be enough? What else are hard drives for except for saved games? What prices are good store prices, and what are great steals? How do I get online with this thing, and what are the monthly costs of getting onto a PS3 network? What other options are there? How can I get the data off my PS2 memory card onto a PS3 one? Are they reliable?
I'm not looking for an Xbox or a Wii or anything. I'm just shopping around for a PS3.