Afraal, Raritan toilets, manual and electric, are top rated because they're they best quality and therefore the most reliable. Their manual PH SuperFlush is the current version of their tried-and true PHII which has been the the top rated manual toilet pump ever since they introduced it in 1983. It will provide 20+ years of reliable and trouble-free service with minimal repairs if it's just kept well lubricated, joker valve is replaced annually and a rebuild it (about $60) installed every 5-6 years.
PH Superflush | Raritan Engineering Defender usually has it for the best price--with the larger household bowl.
Raritan PH SuperFlush Manual Toilet at Defender
The Raritan SeaEra
Raritan SeaEra Promo Sheet is the top rated "basic" electric macerating toilet. If you opt for electric I'll check out who has it for the best price.
How old are your hoses? If even close to 10 years old, it's time to replace those too, even if they don't stink. 10 yrs is the average working life of any hose 'cuz rubber and plastics dry out over time, becoming hard, brittle and prone to cracking and splitting. Raritan SaniFlex
RaritanSaniFlex hose is the top rated hose because it has a 10 yr warranty against odor permeation plus it has the added advantage of being so flexible it can be bent almost as tight as a hairpin without kinking, making most re-hosing jobs a LOT easier. Don't be spooked by the list price...Defender has 1" and 1.5" for $10-$11/ft, which still isn't cheap but worth it if you only want to do this job ONCE. Flex PVC #148 (the cheap stuff) is ok for toilet intake and vent line.
I'll be glad to answer all your questions here or privately.
--Peggie
No experience with electric here, however, I do recommend a full size head instead of the compact size that most boats come with.
That's just a function of the bowl size specified--"standard" aka "marine' or "household"..interchangeable on all manual and most electric toilets. Just specify which size you want when you order the toilet.