“I know I don't NEED more power but thinking ahead....if I get good clean power I might upgrade the speakers some day. Just trying to get the right "sound" now.”

Your situation and future plans matter. As gonk said, if you stay with your Klipsh speakers which are very efficient the 7125 will give you plenty. I run a 7125 with less efficient speakers in a huge room and I’m very happy with it. If you’re planning on investing a bundle on b+w, and/or putting your theatre in a bigger room in your house or moving some day to a bigger house, then maybe the 7500 becomes more appealing for an extra $600.

“Any discernable sonic differences between the Outlaw power options? Anyone done a side by side before?”

This is debatable. I’ve read opinions on both sides in this forum and others. My 2 cents say that your future plans matter more.
I considered the emotive upa-7 before I bought the 7125, and I almost bought it. The 7125 was on sale for 800, the upa-7 was on sale for 600. Specs are almost identical – emotiva has slightly more noise, whether it’s a noticeable amount I don’t know. Only other drawback I could find was resale value on emotiva seemed a lower % of selling price on places like ebay, audiogon and classifieds. I guess these 2 things were enough to sell me on outlaw, but I have to agree with Ritz2: I could care less where something was made – quality and cost matter – geographic orientation does not.