Powers meters sound like fun.

What I would do with $1800:
-buy a new frame and start building it up.
-look for God's own wheelset.
-outfit my current bkie with a rack and panniers and take the left-over money and plan some touring.
-buy some PEDs. Lots of PEDs. Epo, andro and stuff.
-downpayment on a decent car with a good trunk hitch and bike rack that's easy to use and doesn't trash my current piece of poop car.

I'd be OK with Strava telling me I almost never get over 250 Watts, ever.

That's the one thing we all have in common: we're all different.