For a front fork, I would chose a Rock Shox Reba, and then send it to Drake Thomas
isotuned@yahoo.com He can convert it to a coil and it'll be the most reliable fork you could have, plus it will be super plush because it's coil instead of air. About 125.00(inc parts) to get that done.
http://www.socaltrailriders.org/forum/bike-shop-reviews/38201-isotuned-suspension-aka-drakethomas-threads-merged.htmlRigid would be hard on the body for myself, but it's been done plenty of time. I'd rather have the Reba. You can lock it out too btw.
If you're going to get anything less than an XT cassette, might as well get the new HG-61 12-36 cassette, but if you want an aluminum carrier, get an XT 11-34.