The more I think about it...the only advantage of R134a is that it is cheaper which is better if the system develops a leak. Otherwise it seems that some people have problems when they convert to R134a because of it needing a larger condensor to cool...as bweber pointed out, I've heard this another time also.
During my research I keep coming across a POA Update Valve...does anyone know what this is? It appears that with this update valve the system is converted to a more reliable system but it still looks original. If I can do this update and put the system all back to original...I plan to have new hoses, etc. made anyway so that it will look original then I don't expect the new system to have any leaks.
This way I can also keep my current compressor which seems to work fine (this will save me about $150). This way I'll keep true originality and I should have a very reliable system.