The Power Block is solid state - as long as you don't go below the minimum rated impedance (4 ohms) you're golden.
Front loaded cabs have the speaker mounted on the front surface, instead of behind the mounting board.
Ported means the cab is closed back, and there's a hole (port) to allow air to move in and out of the cab. This, in theory, loosens the bass response.
All of this does impact the tone.........................but not by any degree that would be a show stopper. Your main concern will be the speakers.
A 2x12 cab sounds perfect for what you're seeking. ZMAN mentioned Avatar cabs. They have a solid reputation, and they won't cost you an arm and a leg depending on what speakers you load them with. An 8 ohm mono cab should fit the bill for you.
Then you have to choose speakers, and that's another issue where you'll get a thousand different opinions................................
Guitars: 2008 Gibson SG Classic, 2006 Gibson Les Paul Standard LE, 2002 Gibson SG Supreme, 2001 Gibson Les Paul Studio Plus, 1996 Les Paul Studio Gem, American Deluxe Double Fat Strat, Bluesville "Super" Strat Copy, MIK Fender "Limited Edition" Tele, JD Bluesville "Night Pilot", Yamaha AES 820, Steinberger Spirit GT Pro, Taylor 355CE, Ovation 1897 Adamas, Ovation CC057 Celebrity
Amps: Axe FX centered rack rig, Mesa 4x12 cab. Germino Club 40, Johnson JM150 Millennium, Johnson JM250 Millennium, Gibson Titan Medalist Frankenstein.
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