Best Tech Tree

[Praetorian]

Is there any consensus on which is the best Tech tree for heavily modded games?

[Yemo]

Is there any consensus on which is the best Tech tree for heavily modded games?

Nope, no consenus. There are a lot of different tech trees providing a variety of progression experiences.

Though at the moment, only very few have been updated to the radically changed (disimproved) KSP 1.0.x techtree definition.

For modded games I m only aware of the CTT and the SETI-CTT (which is an addon to the former, starting with probes and other changes) being available for 1.0.x.

[Lord Aurelius]

There's no one "best" tree, it's what fits your playstyle best. Most tech trees support mods reasonably well, but the Community Tech Tree is designed specifically to provide a tech tree for modders to place parts in, rather than just rearranging stock parts. It's based on the stock tech tree and has a ton of mod support.

If you would rather not start with manned pods, SETI provides an extension to the CTT that reworks a few nodes and moves a bunch of parts around to better fit starting with probes. Since it's based on the CTT, it still has excellent mod support. Disclaimer: If you didn't notice from my signature, I very much like SETI. It's my personal favorite.

A few others as well (copied from the SETI page, I haven't tried these personally):

Mod-Oriented Tech Tree - 2 versions available, one for a manned start and one for an unmanned start

KSAEA - Kerbal Space and Atmospheric Exploration Agency Tech Tree and Game Rebalance

Adios Tech Tree - Star shaped, category based tech tree, manned and unmanned start available

Road to Kosmos - Tech progress based on historical space programs

Anyways, hope that helps you find a tech tree that fits how you want to play the game.

Edit:

Ninja'd by the author of SETI himself...