A well cooled well made mak makes a wonderful planetary scope but that's the catch ---cooled.
Intes micro and even the Meade 7"mak have cooling in the form of air holes and or fans in the OTA's.
As with any large hunk of glass and more so with an enclosed OTA getting the hot air out before the night is over is required for high power viewing.
The front meniscus lens on a Mak is considerable thicker than a SCT and requires a longer cool down time.
I don't own a Intes but have seen through a 7" f15 unit some time back and found it's planetary views excellent once cooled down, (a 1.5hrs job with fans running) but there not cheap imported into OZ , but are very well made.
The smaller of the Chinese Maks seam to get mix reviews but generally acceptable but my only concern is cool down.
Personally I would prefer a well made 8" f8 planetary truss Newt for the price.
Less central obstruction and heat problems and if a well made mirror is used ( relatively easy at f8 and .95 SR or more) will be better than any Chinese mass made jobs and still short enough and light enough not to pose any real problems for an EQ6.
Remember in any Cassegrain design getting a good primary at the f2's used , requires excellent manufacturing skills even for a spherical primary.
I would like to see the Strehl Ratio of the optics if they can supply them for the Chinese Mak's but the standard Intes are 1/6wave .
The delux units are 1/10
Bang for your buck you can't go past a Newtonian but for a quality Mak the Intes are very good..
Just my 5Cents worth.
This will stir the pot
Mark
Commonly Encountered Wavefront Relationships of single surface
pv : pv decimal : RMS : Strehl Ratio
1/3 : .333 : .094 : .71
1/4 : .250 : .071 : .82 Rayleigh Limit
1/5 : .200 : .057 : .88
1/6 : .167 : .047 : .92 Good
1/7 : .143 : .041 : .94 Very Good
1/8 : .125 : .036 : .95 Excellent
1/9 : .111 : .032 : .960 (.96) Excellent
1/10 : .100 : .028 : .969 (.97) Excellent
1/11 : .091 : .026 : .974
1/12 : .083 : .024 : .978