So your issue is wound in for comfortable hands they bite too close to the bar perhaps? Buying levers is often a more expensive way to purchase or near the same cost as buying a full brake.
If staying with sram you need a guide or code rsc for bite point adjustment. The guide re wouldn’t necessarily solve your issue as they still have the same levers as the guide r. The guide r’s adds swinglink which may help (starts with pads further from the disc and moves them in much quicker) but doesn’t have bite point adjustment.
Personally I’ve not liked Shimano brakes – either how they modulate or the lever feel. I’d probably avoid the Deore / slx / xt brakes and try the Zees (as suggested above) if you want to give Shimano a go – they are meant to offer much better modulation than the 2 pot caliper.
If your guides are new ish you might get £80 for the pair on eBay if you sell those to help fund the next brakes.
Hope would also obviously offer good modulation but you probably want e4’s to offer similar power to the guides – but they are expensive.
Not sure if Magura might offer a more cost effective solution – something like the mt5 might offer loads of power and good modulation?