You should be able to find a used RG570 in the $300-400 price range. They are a few steps up from the 270. They're made in Japan instead of Korea and have an
Edge bridge. The Edge is obviously not the same as the LoPro, but it's 10 times better than the LoTRS.
If you try to drop a new LoPro into a RG270, you'll have to spend at least $250.
If you're already happy with your 270, stepping up to a 570 will make you speechless.