m&k speakers opinion

hi all, i have a set of s 125's for my front L/R and center.

i've been thinking of upgrading to s150thx or s100b for the 3 front channels.
i dont use thx processing when watching movies.
i use my system mostly for movies.
my room is 14x12 with an 8 foot ceiling.
due to my room size:

will i benefit from a s100b upgrade?
will the s150thx be better even tho i dont use thx processing?

Are the 125's small monitors? And you are thinking about going full-range with the addition of a sub, or two?
the s125's have 2 midrange and 1 tweeter vs the 2 midrange and 3 tweeter arrangement used in the ss150thx and s100b. all 3 types of speakers use the same drivers and tweeters. which ever speaker set i go to i will use atleast one subwoofer, but eventually i will upgrade to 2 subs.
I've been a big fan of M&K for many years. I've owned the S-150THX and CR-2401 passive models. Just as the S-150THX surpassed my Spendor S8e at the time, my current JBL LSR4328 are obviously better than the S-150THX in all respects.

I'd pick monitors (active models if you can) from any number of reputable "pro" manufacturers.