Congrats on a fine new/old guitar. Re pu's: don't be afraid to try to dial the stock Fender 'buckers in.....height adjustment, pole piece adjustment can make a big difference.
If you do decide to replace the stock pu's there are a mind boggling number of options out there. It is interesting to note, according to the Seymour Duncan site, the pick ups that Duncan made for Guild to replace the HB-1's were pretty much identical internally to Duncan SH-1 '59 humbuckers. I've never been a big fan of Gibson style humbuckers (love P-90's, Franz, Filtertrons) but since I bought a Japanese Edwards Les Paul clone that came stock with Duncan Seth Lover pu's I've changed my tune. The Seth Lovers are low output (approx 8k bridge, 7.2K neck), not wax potted, and have alnico 2 magnets. These pu's, clean, overdriven and distorted have superior clarity and note separation than most other humbuckers but also retain the classic 'bucker punch.