The V1 is great if you only use it while speeding, but for daily use too many false detections make it a hindrance, to the point where you start to ignore it all of the time. This situation has become worse over the last few years, it really needs some kind of filtering update. FWIW, my V1 is the newest version, and was last upgraded about 6 months ago (V1 offered a newer software update). The cost of V1 updates varies, from around $50 to $250, depending on what needs to be changed within the unit. One thing I do like about V1 is they offer a cosmetic upgrade, where they transfer your V1's guts into a new housing, for around $150.
Remote installation detectors are not worth the effort unless you live in a State where detectors are illegal, eg Virginia. Laser shifters are nice, but illegal - if you decide to use one, Blinder makes the better reviewed units. Installing an all in one solution from Escort or Beltronics will leave you with a detector that is drilled into your car, will become obsolete in about 4-5 years, and with marginal laser jamming. Why not get the best mobile detector, hardwire it for a degree of concealment, and install the best laser jammers available? Cost is about the same, either way you go.
Beltronics is Escort's sister company, and there is a great deal of shared tech between the two entities. The current "top dogs" are the Escort Redline, and Beltronics STI Magnum - the Magnum is the same as the previous STI driver, but with a 50% increase in detection range. It doesn't have the GPS capabilities of the Escort line, but frankly the use of GPS has always seemed a bit extraneous to me. I don't take my unit inside my house daily to USB update it, as would be required with the Escort, and I don't want to spend 15 seconds each time I start my car syncing a detector with my phone, as would be required with Cobra's efforts.
I want a solid detector I can leave in my car, which will warn me of actual threats, and shut up the rest of the time. This is what the Beltronics STI Magnum offers, and it's the detector I leave in my car. Because of my business, I need to have the current crop of top line detectors available; I could physically drive with any current model, since I own them all, and the Beltronics offers the best solution to my needs, and my area; it's the unit I recommend, and use.