Katie - My birthday is in April too : D
I had and sold the R4A, not that I didn't like it, just too many cameras. It really excels for shooting 21, 25, 28mm and is good with 35mm too. The 50mm framelines are pretty small - I didn't care for using 50mm on it works. If you find you like the 24mm you are using, a 25mm CV lens is also nice. Both the 21 and 25mm from Voigtlander are small and light, yet well built. I prefer the CV 21/4 to the venerable Zeiss 21/2.8!
Sorry for not being able to provide any equipment, but if I see anything, I'll send it your way.