Looking for A Cost Effective Phono Amp- Any suggestions?"

There is a PS audio GCPH phono stage here on Audiogon for $450. I have the parts conextion modded GCPH version in a second system. I think it is a great bang for buck phono pre. Plenty of gain not thin sounding at all, nice detail, big bass. It has a phase switch, mono switch, volume control all from front panel and a remote. It can also be used plugged directly into an amp, no Preamp needed. 

Look at a Schitt (sorry) Mani phono box. Highly rated (for the money) and only cost $150.00. Use this as your starting point.

In addition to the phono stages others have suggested, I've measured the Pro-Ject and Rega phono stages and they work very well.

+1, for the PS Audio GCPH. I liked being able to remotely MUTE the output, when cleaning & dropping the stylus. Also, just before my Safety Raiser did it’s thing, at the end of the record. If you can solder; HEXFREDs and better regulators(both inexpensive) are a snap to install, which make a dramatic difference in performance, when coupled with a nice PC and fuse(as your finances allow). There are other easy mods, as well. Won’t disappoint in stock trim, either. Lots of flexibility and performance, for the money. https://www.psaudio.com/wp-content/uploads/2017/03/GCPH-Phono-Preamplifier2-Owners-Manual-Rev-B-V2.pdf

I noticed your mating with a Linn. I have PS Audio matched with a LInn Lp12 with pink link out board power supply with Soundsmith cartridge. The pink link helps with dynamics. When I sent lp12 in for upgrades I pulled a Linn Axis with basic plus tonearm out of closet to match with ps audio. I always thought Axis was light in presentation but had never plugged it into ps audio. I was a little surprised how much better bass was now mated with the ps audio. From what I understand they are easy to mod and a hifi tuning fuse did help a in my GCPH. Never thought I would use phase switch but I use it all the time.