Yep - that one TimT shows is the same one I've got. No idea of the brand but it seems to pop up at virtually all homebrew supply shops. According to this site it's a "Royal" brand capper but look around. You don't need to spend a lot of money on this. If the capper can compress the outer edge and make a good seal between the inside of the cap and the bottle lip, you're good. I don't see the need for a $75 piece of equipment to do this. It won't do it any better than a hand capper like this one.
Beer Bottle Cappers : Northern Brewer
Kegging is fun but adds cost quickly - and gives you a lot more junk to sit around cluttering up your basement when it's not in use. It's very convenient if hosting (or bringing beer) to a party but not so much if you're giving out samples to people from work or whatever (I've brought in bottles and just handed them out - a lot easier for people to take home and try - plus I get to design cool / funky / fun labels that way or paint the bottles as I like to do - they make great gifts).
IMHO homebrewing is about innovation - simply buying a lot of expensive equipment will not make better beer. Better control of what you have and better ingredients will. Most of all, keep everything operating room sterile - that's the most important thing. I'm really particular about making sure my supplies are sanitized all the time and "if in doubt, throw it out". I also triple-ferment all my beers to help increase clarity but you don't have to do that necessarily.
Enjoy! It's Imperial Stout season!