Back in '08 I got a new '08 XL1200C and put 10k on it before a stage I conversion consisting of full V&H, Big Sucker, SERT, and Andrews cams. I now own a bone stock 1100 Classic. Stock for stock, I prefer the YammerHammer. It's more comfortable, it isn't top heavy like the XL, the Sporty's ride was rough, even with Progressives. Come hard out of a curve on a county highway and sometimes the XL's rear would leave the ground or break loose. The 1100 is more smooth and a softer ride. Plus it feels quicker than the stock Sportster. The 1200's mileage was better at 57 (stock) and 40 (modified). I'm looking forward to doing some performance upgrades to my new to me YammaHawg 1100 Classic soon. I've already found my exhaust, ignition, intake, just trying to decide between the SSCC 429's or 502's. While I don't think I'll net the same power with the Yamaha as I did with the HD, I do think it'll be more fun and an all around better bike.
And if yer lookin' ta find a Harley that actually handles, better than most bikes I've ever ridden, try an FXR (FXR, FXLR, FXRS, FXRT, FXRP). The best handling frame HD ever made, I feel.