I have k2's and love them. At the time I was going through the big D and bought the top of the line ones for myself for my birthday. (felling sorry for myself
)
I had never bladed before in my life so I don't really recommend everyone to buy the most expensive ones.
Do go to a sporting goods store where the sales people have a little knowledge about them. The bigger the wheels the faster you will go. Start somewhere in the middle. Mine are 76 mm and I go pretty good pushing a jogging stroller.
Don't get the ones at the discount stores unless they are a brand that you have heard of. Some of them are just too cheap and you will not stick with it if they don't roll nicely.
My friend has Rollerblade brand and loves them. I would just try them out in the store and see which ones feel the best on your foot. That is also why you want somewhere where the employees know what they are doing.
MOST IMPORTANT is get protective gear!!!
At least wrist guards and knee pads. They are WORTH the extra money -- about $12 - 15 each and sometimes they come in a set.
ALSO don't go when it is still wet out. I found this out today. I didn't fall but I think I put my hip out catching myself. The trail was still damp in the shade and WOW, it was really slippery.
Hope this helps and have fun.
Bunny