Record Cleaning Machine - Loricraft PRC-3 vs. 4?

Tough question. I wrestled with the same until I found a used PRC-4 Delux and bought it. They are great machines and with the right fluids, extremely effective.

 
I have a PRC-3 and its works fine; the 4 also does the job well. You won't go wrong with either.

The key to getting records clean is not the difference in strength of the vacuum pump between the PRC-3 and the PRC-4.

The key to getting records clean is:
* the fluid used (AIVS for me),
* fluid application technique (brush lightly, don't scrub),
* most impt. the amount of time the fluid is on the record,
* and lastly, a pure water rinse.
 

Thanks for all the helpful responses.
Both the PRC-3 and PRC-4 look like very good options, and it is not a question of one being inferior to the other, but rather if one really offers any significant advantages in practice?
It sounds like other steps in the cleaning process are equally important considerations, and unrelated to a particular Loricraft model choice.
I am sure that most users would be happy with either one.

The Loricraft "Upgrades" ( ---> Price) are mainly in finish, Dust cover and power of the pump. All of them do the job but normally you will keep the unit for a long time, so it makes sense to invest in the more powerful model. The pump is simply better quality. PRC3 was available 2003 (or earlier?).

I have the PRC-3. When I was talking to the US importer at the time (Smart) he told me that the motors are all high quality medical grade European and will all have very long life. These motors run cool, only difference is amount of vacuum.