I've used Spoon for about 9 shirts and talked with them extensively about their MTM suiting. The quality is much higher on their suiting and the fabrics are nicer. Plus, as far as MTM goes their process is closer to bespoke. Multiple fittings are involved and they have a local tailor that does the pattern, if I recall.
Indochino's an affordable option out there, but they're definitely going the cheaper MTM route. Their suits are based off of ready-made patterns. They can't really do stuff like account for sloped shoulders or weird drops. Their details are also a lot more "fashion forward" (like skinny lapels) that will look dated in a few years. I went to their traveling tailor event in Chicago a few weeks ago and got a suit made up for me as a review unit for a blog I write and I can't say I'd highly recommend them over other MTM services that might charge more or ready-to-wear options that cost the same.
If you're looking for something at Indochino prices yet in "ready to wear", then I'd suggest checking out Suit Supply. Decent cuts, good fabric, good construction, affordable intro-level prices.