There are many Taylor lovers here. Great guitars but to me they are way to bright. I own a D15 & it's great. Not my favorite acoustic but it is a very solid guitar. All Mahogany(top sides, neck) sounds great especially with a slide(Mahogany has a nice bite for this).
When it comes to selecting a acoustic guitar there are many things to consider. Body size, wood materials, scale length, etc. Another thing to consider is do you play with your fingers or do you tend to strum more? Are playing to accompany your own voice or are you going to play more detailed stuff?
I am using Martin models as a base of explaining things
A Martin D 18 (highly underrated) is a Dreadnaught size... A big guitar, the neck is narrower then smaller guitars. This is a great strumming guitar. It has plenty of power & projection but isn't necessarily the best guitar for fingerpicking. The nut is 1 11/16th and this makes the string spacing a touch to tight to finger pick. The 00018 or OM18 IMHO would give you more versatility. The body is smaller, the scale length is a touch shorter and this makes the strings feel less stiff, so fingerpicking is easier. It also has a wider nut so string spacing is more suited for fingerpicking. The primary difference between the 000 & OM is scale length. The 000 also does not have scalloped braces but the OM does. Not a big deal but some feel it is. I like the smaller body size.
It enables me to play very softly & get a great tone yet you can still play pretty hard without the guitar over-driving and distorting.
The Martin line is pretty simple the 28 series are Rosewood, the 18 series is Mahogany, and the 15 is Mahogany topped as well as back & sides. The "D" size is a big guitar with some depth and this makes them a bit boomy in Rosewood the Mahogany in a bigger guitar IMHO would give you more balance.
The best thing for you to do is go to a good music store & sit & play. Don't pay too much attention to the name on the headstock listen to how the guitar responds to your touch & make your decision with your ears and your hands!