I'd say ignore brand names, shop ALL brands, handle them, and really take a look at various features to weigh which ones are truly important to you, then choose the camera that has all the key features you really want, while being comfortable in your hands and fitting your budget best. You're not going to get a bad camera nowadays, so no worries on that front. As far as lens or accessory selection, Sony and Pentax have well over 100 lenses currently available each, and 300-400+ used lenses that are fully compatible with them - they don't have to offer two versions of every lens since stabilization is in the camera body, and they don't have to distinguish between lens or body-driven focus motors since their bodies all have motors built in to drive either type. While Canon has the most and Nikon the second most lenses, there are very few photographers who would honestly be limited by a selection of 'only' 300+ lenses to choose from. What the pros use doesn't mean enthusiasts and amateurs all need to use the same thing - pros long ago committed to a system and are fully entrenched in it with tens of thousands of dollars invested, and can ill afford to switch. And if you are a pro, who needs in-the-field lens repair or replacement and camera repair in exotic locales...hardly something that needs to be weighed for the local enthusiast who just wants to enjoy some hobby shooting. But if those things weigh importantly to you, so be it...include that in your decision making process.
It should be all about considering ALL options and weighing ALL features, accessories, services, and price, and then finding the best camera with the least compromises. Think on if any particular thing might be a standout necessity for you: live view, video autofocus, battery life, stabilization in body, microfocus, weatherproofing, tilting/movable LCDs, and so on. Some have a few of these features, some are missing...some may be very important to you.
Sony DSLR-A580 / Sony 18-250mm / Minolta 50mm F1.7 / Sigma 30mm F1.4 / Tamron 10-24mm / Tamron 150-600mm / Tamron 90mm F2.8 macro / Minolta 300mm F4 APO
Sony A6000 / 18-55mm F3.5-5.6 / 55-210mm F4-6.3 / 10-18mm F4 / 35mm F1.8 / 16mm F2.8 / via manual adapter, lots of Pentax K mount, Konica K/AR mount, and Leica M mount manual lenses