Just purchased B4 XGR
Bit of stretch but B for boxer, 4 for cylinders, dad was a professional boxer and I have had boxer dogs all my life, dad used to hang mini boxing gloves from the rear view mirror, little tradition I keep going, so rather happy with this!
Here are my other close contenders if anyone is looking for ideas;
D4 XGR, FRZ 866, H1 XGR, K80 XGR (the gf's pick being named katie)
X- GRX, the dash being any number, a fair couple available.
Decided i wanted a shorter reg to reduce the plate size on the front