I have a Paragon TNF 27-3, which I use only for bisque firings. This is my 2nd one. I destroyed the first one using it to fire to cone 6 and had to change elements every 3 months. My thinking is that I might buy a new one every 4-5 years for bisque firings.
My glaze kill is a L&L Quad Pro EQ2827-3-240. This is a work horse,which is fired continuously, 4-5 loads weekly. Had it 2 years (June) and haven't changed the elements yet. (bought a set a year ago thinking I would need to change soon ) I've changed thermocouples a couple of times and relay switches once (I had 3 on hand and my nephew changed all of them ... when only 1 was bad). I like L&L ceramic element holders (even though I have yet to use them ... in a lesser kiln you will change elements way more often ... so those ceramic element holders pay dividends. )
Paragon customer service is very good, I call my local dealer for parts and problems and they are very accommodating . Not familiar with the biggest little kiln but I would be very discriminating in selecting a Paragon kiln if you are planning to fire to Cone 5 or 6. (just because the label says "Cone 10" doesn't always mean a kiln will fire that high on a continual basis) Needing a frequent element change would 100% deter me from purchasing a Paragon for Cone 5 or higher firings.
Customer service at L&L is excellent. I call the company direct for parts. I find them to be extremely accommodating. About 2 months ago when my nephew changed relay switches, he unknowingly left one unattached. Called L&L on a Friday afternoon about 3:00 pm EST. Sent the customary email, not expecting them to call back until Monday. Got an email within an hour, saying they couldn't reach me (cat knocked phone off hook). They called back at 7:30, EST, telling me how to fix the problem (checked and one relay switch was unattached, just like they predicted). I found this to be extraordinary customer service.
Are you getting a smaller kiln to accommodate your electrical box? Might consider adding another meter and box, specifically for the kiln. I have 3 meters and boxes on my property and will be adding a 4th when my next building arrives. I've found it cheaper to add a box/meter if you have much distance to run that low gauge wire. Plus you never have to worry about overload. A 200 amp set up only costs about $50 more than a 100 amp one. Adding more amps will allow you a bigger kiln. If you compare costs, a bigger kiln isn't proportionately more dollars.