[junkinduck]

I feel qualified to advise on this. I am three years into building a log home and have bought and tried a lot of stuff. As for compound miter I wouldn't trade my slider. I am fortunate to have an older DeWalt DW708 which is heavier than the present DW718. If you can find one I would recomend the DW708 but good luck. My friend has a Dewalt non sliding and although a great saw it is tough to cut 8" t&g siding on a 45 deg. I did a lot of this on the house. If I were buying new I would look at ridgid from HD. They have a life time warranty on a lot of there power tools even the batterys. I have some of there battery stuff and am pleased with it.
Nailers are a broad subject. I have several and it all depends on the job what I use. I have a paslode hoseless butane framer that I love. Paslode also makes a butane finnish nailer. I have borrowed the finnish gun and it worked well. This would keep you out of the compressor market. For finish nailers I like the 15 gauge angled finish nailer. It shoots a round nail and is easy to get in tight spots. Mine is a dewalt D51276K and it has been good to me. I like paslode stuff though both butane and pnumatic. A guy that helped me on the house had a dewalt cordless electric nailer that he bragged on and he was a pro contractor, I didn't try it.
Compressors are a budget thing. I have a big two stage in the shop and got tired of dragging hosr across the yard so I bought a cheep noname pancake that has run the air nailers for a year now without a problem and it is oil less. I wouldn't reccomend oil less but it was cheep and not my primary compressor. I also tried the belt clip CO2 regulator (jac pac) uses a paint ball bottle I have mixed fellings about it. I wouldn't get it unless it was cheep, you didn't have a lot to do, and you had a fill station near.

Hope this helps