What would you guys choose if you're main needs were guitar transcriptions with both standard notation, tabs and all the necessary articulations at a modest price?

Have a look at Forte 8.

first look at Forte I see a 4 voice max per staff. Doesn't seem like that's very friendly with a 6 string guitar. Or am I misunderstanding?

I'm sure it does guitar and bass tabulature, although I've never used tabs.

Guitar Pro?
https://www.guitar-pro.com/en/index.php 
There was a deal recently to get it for half price which I did. Not sure if that deal is still going but Larry will know.
 
Or maybe Smartscore Guitar Edition... http://www.musitek.com/smartscore-guitar.html 
 
ZT

Pass on Forte. I have the top tier Forte 7. The developers are mostly interested in choral and classical arrangements. I've uninstalled it. I have Notion 6, Ovation 5, Guitar Pro 6 and MagicScore Guitar 8.
 
Although the UI for MagicScore Guitar 8 looks very old, it may be the best bang for the buck for what you want to accomplish ($40). I pity anyone trying to write a score/tab with GP6. Ugh. GP7 is supposed to be entering beta shortly. Hopefully, it has a much improved editor. Notion 6 and Ovation 5 are both good, but likely more than you'd like spend.
 
http://www.musicaleditor..m/magicscore-guitar.html

I really like Notion (still on 5). And their iPad app is great too so notation is all over the place now ;)
 
I used to like Finaly a lot but it got a bit... "old" for me.
 
EDIT: I see they have something called Progression which seem to be aimed at guitarists
http://www.presonus.com/products/Progression

Sixfinger
first look at Forte I see a 4 voice max per staff. Doesn't seem like that's very friendly with a 6 string guitar. Or am I misunderstanding?

I've asked this question before on another notation software and got a clarification. 4 voice does not mean 4 notes played at the same time. Guitar notation is mostly 2 or 3 voice - for finger style, the bottom voice for bass, mid for chords and top for melody. In most classical pieces, it's mainly 2 voice. Each voice can be more than a single note, supports it's own region [edit] of rest notes, ties, etc.

I'm still researching and trying a few demo's. I can't yet find a demo for Notion.

Notion demo here (it's the actual software, runs on demo if not activated). I've just upgraded to the current version.
 
http://www.presonus.com/products/Notation-Software