Compare the reviews from other MTBR users. If you scroll through the reviews there's plenty of detail on what riders did and didn't like.
K Trak 3.78/5 chilies
http://www.mtbr.com/cat/accessories/Extras/ktrak/26-wheel-snow-adapter/PRD_417246_117crx.aspx
Pugsley 4.69/5 chilies
http://www.mtbr.com/mfr/surly/29er/pugsley/PRD_365471_1548crx.aspx
I haven't ridden the K -Trak, but I'm sold on the Pug or any other fat bike shod with Endomorphs. It seems the most versatile and the most mobile.
You can trade out other wheelsets as you see fit, but for most fatbikes the wheels will have to be built specially to match the offset or hub width of your bike. If you look around the web (ie.,search flickr for "surly pugsley") you'll see fatbikes with cyclocross tires, 29er tires with and without fenders, 26er DH tires, and slicks. There are several users on the boards here that use their fatbike as their 'one' bike.
Pricewise, I feel the fat bike will be a far more sound and long term investment if you have a long and/or snowy winter (like anywhere in Manitoba). I'm in the maritimes, (PEI) and my fatty came to about $2000, but it could be done much cheaper if you have a donor bike that you can use for parts or if you ask nicely for access to your LBS's parts bin.
For detailed answers to your other questions about floatation, check the FAQ:
http://forums.mtbr.com/showthread.php?t=498930
K Trak 3.78/5 chilies
http://www.mtbr.com/cat/accessories/Extras/ktrak/26-wheel-snow-adapter/PRD_417246_117crx.aspx
Pugsley 4.69/5 chilies
http://www.mtbr.com/mfr/surly/29er/pugsley/PRD_365471_1548crx.aspx
I haven't ridden the K -Trak, but I'm sold on the Pug or any other fat bike shod with Endomorphs. It seems the most versatile and the most mobile.
You can trade out other wheelsets as you see fit, but for most fatbikes the wheels will have to be built specially to match the offset or hub width of your bike. If you look around the web (ie.,search flickr for "surly pugsley") you'll see fatbikes with cyclocross tires, 29er tires with and without fenders, 26er DH tires, and slicks. There are several users on the boards here that use their fatbike as their 'one' bike.
Pricewise, I feel the fat bike will be a far more sound and long term investment if you have a long and/or snowy winter (like anywhere in Manitoba). I'm in the maritimes, (PEI) and my fatty came to about $2000, but it could be done much cheaper if you have a donor bike that you can use for parts or if you ask nicely for access to your LBS's parts bin.
For detailed answers to your other questions about floatation, check the FAQ:
http://forums.mtbr.com/showthread.php?t=498930