I think a lot of it comes down to taking control of the JPEG engine. IMHO, Pentax JPGs are reviewed unduly harshly because of the color profile that the cameras default to out of the box ("Bright"). Also, the "issue" with blown reds is common to most digital imaging sensors, and not at all specific to Pentax - see
this discussion, for instance. BTW, some people feel the Fuji sensors have a problem with greens, but I couldn't say whether that is really the case or not.
If you intend to
not shoot raw - a completely legitimate decision, IMHO - you should explore the very wide customization options available in the various color profiles that Pentax offers, as well as the options for highlight and shadow correction (under D-Range Settings in the menus, at least on my K-3). Find something that works for you. I shoot a slightly tweaked Natural profile, with highlight correction on and the lowest level of shadow correction. Personally, I'm super happy with Pentax's JPEG engine, and most of my shots only go through some light tweaking once out of the camera. I suppose I'll eventually move to RAW, but so far my attempts at RAW postprocessing have not equaled the results I get from my customized camera settings plus a modicum of tweaking in post. There's a real skill involved in RAW processing, and although there's undoubtedly value in acquiring that skill, you should, I believe, feel free to decide if and when you decide to head down that particular path as you progress as a photographer. I feel that the vast customization options that the Pentax JPG engine provides give you that freedom, and provide excellent OOC images.
p.s.: If you shoot a lot indoor, you might also want to change the default for white balance under Tungsten light from Subtle to Strong Correction.