Right now I have both a 4500 and a 4300. I'm considering selling my 4500 because my 4300 produces the same tone, albeit slightly less deep, but with an external cabinet I don't miss that lower octave or the 25 pedals. The 4500/4520/4502/4500R consoles have 8 internal speakers- 2 12", 2-4" on the rotating fully crossed over Spectratone ( which has louvers on the side AND the top of the organ for excellent player sound!), a 5", a horn, and 2- 6x9's. There are two amplifiers so you have a fully crossed over, professionally voiced stereo organ in the 4500 series. Oh' how I love Hammond organs, but none have organ contained sound systems like this in them until the Elegante.
There will be a 4300 Wurlitzer undoubtedly show up in your area before you would ever need to travel very far for one. Wurlitzer is one brand that for all intents and purposes is still alive and well for parts and service. The former employees of the factory bought out the entire Wurlitzer inventory and have parts and service for 170 models of pianos and organs. They sell their parts cheaper than anyone else, are guaranteed, and can also repair your chassis. The chassis in a Wurlitzer 4500 that typically need attention are the two easy to get to and remove amplifier/power supply chassis. These only weigh about 4-5 lbs. each and come out by removing 4 screws and unlugging impossible to mix up octal plugs ( like what Hammond and Leslie use). Wurlitzer - or Morelock's Wurlitzer Parts in Mississippi recommend changing all of the smaller capacitors on the two amp chassis. They can do it, or send you the parts. They are skilled folks and only charge $40 plus parts to rebuild each chassis. It amounts to about $200 total for parts/repair/and shipping for both chassis to be rebuilt. Owning a few of these organs I can testify to how sturdy and dependable they are. Wurlitzer used high end parts and really all that goes out are the electrolytic capacitors, which go out in any organ. The ones on these two chassis for some reason are all that usually go out. The tone generators can sometimes need a little bit of looking at, but it's not difficult for a good tech. The tone generator chassis can also be mailed to Morelocks and is not difficult to remove as I recall.
Here is Morelock's contact info and two video's of an album with ONLY a Wurlitzer 4520 ( no other musicians or instruments)
MORELOCKS WURLITZER PARTS
37A Main Street
Rienzi, MS 38865
Also look up Mr. Fantastic and the Wonderful World of Wurlitzer