QUOTE: top: 'thoughts of other NG drivers'...
Yes.
Flew the 737 for 5300 hours (about 3500 on NG) and had several anomalies with the rad alts (both left and right). Was not uncommon to be unable to reproduce the problem on the ground. Probably had an MEL'd inop Rad Alt about 5 times (more commonly the right RA funnily enough) on the NG as well.
No big issue really if you are fully aware of what you won't have available to you as a result.