Re: upgrade coming, should I get the Note 3 or wait for the S5? (or possibly even wait for the Note
S2 + "note series" form factor/features = Note (original)
S3 + "note series" form factor/features = Note 2
S4 + "note series" form factor/features = Note 3
S5 + "note series" form factor/features= Note 4
From what I've read the Note 3 is a great device. Probably more of a step up from Note 2 to Note 3 then the S3 was to the S4 was.
That being said, if you have a Note 2 then I'd say wait for the S5 to see what it's like. If you're happy with that and don't really need the size/features of the Note line, go with the S5. If you like what the S5 has and need the features of the Note series, either get the Note 3 for cheaper (prices will likely drop somewhat) or wait for the Note 4. If Samsung follows their trend, the S5 will reveal the flagship features for the Note 4. Of course the Note always ups the ante' from the S model previous but still... the S model seems to be a pretty good indicator of what the Note will be.
Also keep in mind there have been rumors of a new/different flagship line - I believe it would be the F-series which may or may not have a metal body instead of poly-carbonate/plastic of the current devices.
Unless you need the upgrade within the next few months, I'd say wait for the S5 at the very least. My vote reflects waiting for S5 but like I said nothing wrong with upgrading to the Note 3 now. I know I would if I had an upgrade available!