You mention not wanting to break the bank....that means something different to anyone you talk to. So what's your budget?
If you're looking for -3 degrees, you definitely won't achieve that with just a minor lowering. You'll for sure need to looking into UCA's with adjustability.
I'd avoid the Arospeed ones that you linked to. Partly purely because they're Arospeed, and partly because of the design. That bent/stamped steel design is similar to the Skunk2 design...and I ended up running into issues with that in the past.
1. The bent flanges left very little room to get a wrench in there to tighten the bolts to the chassis. Not too big of a deal if you're doing it once. But it you're constantly doing a "nut and bolt check" before/after races, the lack of room gets pretty annoying.
2. On the Skunk2 version, I found that the rear of the boxed out section around the ball joint was actually making contact with the steering knuckle. It would contact, then "pop" under hard cornering. By the time I finally figured out where the noise was coming from, it had worn out a quarter-sized area from that boxed section.
3. It looks like Arospeed is still running the tiny washers/bolts that fasten the ball joint to the uca. Most companies have moved on to a ball joint that basically "clamps" above and below the UCA.
I've been running the Special Project Motorsports (Kiwi) uca (basically re-branded Hardrace) for a while now with no issues. It's tubular, so the clearance issues are non-existant. The "boxed" area is notched, so it doesn't contact the knuckle. And it comes with bronze bushings. They were a limited run though, and they're no longer available though.
Here is a link to the Hardrace uca's. If the photos area accurate, then it looks like they're gone back to the type of ball joint that fastens with a series of small bolts/washers. Not sure how I feel about that.http://www.buyhardrace.com/product/hard ... x_277.html
Last time I had a proper alignment done at Chewerks, I had asked him what he thinks is the best uca available right now, and he said he likes the new design from PCI.https://www.pci-racing.com/product/88-9 ... trol-arms/