Re: PGM300RE or PGM401?
They are very different guitars.......... it is a tough choice....
That said, if it were me, I would be going the 401. But that's because I have a 550 that realitically is almost the 300RE without the dimarzio's, reverse headstock and paint job.
Both are great guitars, I think it would get down to what you want. If you already have a MIJ Ibby with a trem, a fixed bridge model would make sense.
Also bare in mind that the 401's pickups (Air Classics) are more vintage and have lower output than the 300's PAF Pro's..... The 401 is also an ash body, whilst the 300RE is basswood.
They will produce very different sounds.
Good luck with the choice, either one will be an awesome axe, make sure you post pictures!!!