Appropriate answers from the other 4 guys lol, Joe Blow would actually be BLOWING money for either option, .biz BLOWS big time, we would not buy EITHER one (heed some of our advice, dude) and if you really love that 2-word term and decide to stick w/it then acquire BOTH the .biz AND the .com with a hyphen, it's only $9 or so extra .....lol
I would use the hyphen .com (the .biz domain you can simply forward its url to your hyphen .com site) if I had to choose one of the two..... also .biz domains get terrible se results in general regardless of the domain term, ANY .com is better than a .biz, even hyphenated ones
Now I know it's an idea only and the options are .biz (all gTLDS may be taken for the non-hyphen but that don't mean dick, ie you'll still have a lousy domain in .biz even if the term is great) or hyphenated .com. Rethink your buiseness or site name. You won't be reselling it but I don't want my site having a .biz name, a hyphen .com is a bit better (just a tiny bit tho.....) get a new term and
do not make plans for your business/site UNTIL you've secured a non-hyphen .com
If the site were already established and generating income in .biz or hyphenated .com versions that'd be another story, although buying based on past revenue doesn't assure you that income will be sustainable, so even then it's not a great idea acquiring those domains
Paying at least a few thou to buy a .com is expensive (no hyphen) .....but just might make some sense if the domain is really dynamite (and non-trademarked).....
There's a good domain name I want but the .com is taken. So my options are good-domain.com or gooddomain.biz.
All the other TLDs are registered, even .us.
I would not be interested in selling down the road, I just want to develop it over the long term to generate some income.
The .com would probably cost me a few thousand at least to purchase off the current owner - maybe more - and I am not willing to invest that much money in the domain name.