I tend to strongly disagree with Orlyandico.
The SX2 , SXD2 ,SXP, SXP2 are all excellent mount, way above any Chinese made mount, the big difference in price is that they work right out of the box after being extensively tested with high craftsmanship.
You do not have to tweak anything for them to do their intended job from the get-go.
And as far as you say "they don’t have the reputation of quality." I don't know where you get that from but I disagree there too.
The SXD2 series and up for example have what they VPEC, it's a PEC that is embedded in the mount memory for high accuracy tracking, you can add PPEC on top of it, and obviously you can guide.
Guiding here, most quality mount, including Vixen, don't need ST4, you can just pulse guide using ASCOM, one less cable... just look for that feature in a mount specs.
The polaris / super polaris mounts were carbon copied and replicated in many other brand, and if you tell me they are cheap Vixen , remember they were originally made in the mid 80's early 90's, then they were up there, even today they do a very good job, you will not track at 2500mm Fl, but wide field, no problem at all.
Now if you want perfection get a MY-T mount, the second best Takahashi followed by Vixen , Losmandy newest generation, Avalon etc
I do not talk here about the high end brand, they are high price and they are so... well, that good.
Just my 2 cents here...