Communications & Ear Protection, Inc.
Excellent in stupidly high-noise environments, work as well in DCs as they do in a Gentex, for not a lot of dosh.
In your average touring GA type though, they really shouldn't be necessary.
ANR in your DCs will cut out some of the low-frequency stuff, and make things *marginally* easier to hear, but not a huge amount.
When I was in your position, I did buy a pair of factory built DC ANR somethingX's costing hundreds and hundreds of pounds. I've still got them...somewhere...but to be honest the money would have been far better spent on avgas.
Congratulations on the solo, but IMHO stay with your existing kit and spend the dosh on flying. After a while, you brain becomes more adept at picking out salient details from the crackling and distortion of VHF comms.
If, on the other hand, you find yourself getting out of the aeroplane with your ears ringing from ambient noise and the effects of pumping the volume all the way to 11 to overcome it, look at ANR or, my preference, the CEP link above or something like Clarity Aloft.