Look for the best lenses possible...if you continue with 4x5 they can be used on any camera body...just change out the lens board...
Go with a major name brand and there should be plenty of parts out there when you need them...
You can also use a 120 film backs if you don't always want to use 4x5 film...
There's no need to waste money on expensive lenses. The Rodenstock Sironar S is way over kill as are most lenses today. The Sironar S is highly regarded for resolution and coverage but out of sight in price. When it comes down to it even many turn of the century lenses are more than enough. For many years I used a very early Dagor Series III from the late 20's or early 30's for catalog work for Philips - Magnavox - Philco. It was so old that it wasn't factory coated and had it's own bloom (natural coating from oxidation). I shot the catalogs on 8x10 Ektachrome and it was just as good as my new Symmar. I liked the larger image circle of the Dagor vs the Symmar. One of my current lenses is a 60 year old 12" Commercial Ektar for my 8x10 and 4x5 with excellent results. I own quite a few modern lenses yet and have had the best of the best, the Apo lenses and there's no difference unless you're an exceptional photographer and making murals. If you need the additional image circle for product to architecture then that's one thing but just to buy the "Best" for bragging rights then that's silly. Anyway, what is the best? Most coverage, least flare, highest resolution, least distortion, what is the best? The best is what works for you for your application. I even used a turn of the century triple convertible B&H Zeiss protar on my 8x10 for some major commercial jobs. I was ancient and had a gouge in the front element and was made 50 years before coatings were invented. It was a stellar performer.
Product work in studio, the Goerz Red Dot Artar and Rodenstock Apo Ronar are tops and I've owned several and used them for decades. They're shy on coverage but super flat field and apo process lenses for close studio work under 10 times the FL of the lens. Oh yes, they're slow, f9.5, f11, f16 wide open. For general work the Schneider Symmar S, Nikkor W, Fujinon W and Rodenstock Sirronar N are the tops and reasonably priced used. Great coverage, f5.6 on most and sharp as a razor. For larger image circles the vintage Goerz Dagor, Rodenstock Sironar W, Schneider Symmar HM and Fuji 1st version W Fujinon are great. Dagor's, Sironar W and Symmar HM will set you back some major change. For the really big image circle the Schneider Super Symmar XL will blow a hole in your wallet but they cover unlike anything else.
Great reasonably priced vintage lenses with adequate coverage and classic rendering are the Kodak commercial Ektatr's in Ilex shutters. Also the classic Kodak Ektar 203mm f7.7 Ektar is superb. It's tiny and ultra sharp even wide open at close distances. I have one and have used it for years.
You can spend a boat load of money but you'll never see the difference.