As some of you have gathered from some of my recent posts, I'm in the process of modifying my Trek XO cyclocross bike into a light tourer. I've orded most of the parts I intended to switch. I've ordered a Deore LX rear deruallier and 11-32 cassette, bar end shifters and seperate brake levers.

My dilemma is this... I can't decide if it's worthwhile to replace the Sora crankset with 105. The chainring size is fine for light touring (52/42/32) with the 11-32 cassette and the 105 as the same chainring size. The 105 is weighs a little less and it's better quality, but is it worth it? Performancebike.com has a new 105 triple crank set for about $100, and with a compatible bottom bracket, it would cost about $125. Do you think it's worth it? As anyone had experience with both sora and 105 cranks?

Also, on ebay, someone is selling a 105 crankset with 52/42/22 chainrings. The auction still has about 4 days to go, but it looks like it will go for about $40. I'd still have to get a new bottom bracket, but altogether it would be about $65. It really caught my eye because of the size 22 chainring; not only is this usefull for touring, but it's also nice because of all the monster hills here in Seattle Any useful input is welcome.

Correction: chainring sizes are 24-39-48