Oh yeah if K band is still in use around you GPS lockout is almost a must. K is not used around me so I just turn it off. Definitely do some research but I'll give you a quick summary of some stuff I learned since poking around RD forums.
The Valentine Gen 2 are having some initial quality issues so I'd wait on them. If you are good with used a Uniden R3 is a great choice that has GPS and good BSM filtering. Valentine 1 Gen 1 is another good one if it has the latest software with Junk k fighter on it. I still found it to be noisy with K band so I run it with K band off but in your case you could download JBV1(Android) or V1Driver(iOS) and run GPS lockouts as long as you are okay with pairing it to your phone. R7 is the newer R3 and Radenso makes some high quality stuff.
Arrows are not needed but I do like them so that I know if I passed a threat. Like the other night with the office at the gas station. It was a Dodge something rather with the rear brake lights that are unmistakable but I knew it was an officer because as I went by my arrows changed direction.
Use this map to help determine what is used in your area. Since you are in Texas you get it all lol
https://rdfgs.rdforum.org/