I have an answer for the first part of your question, because I looked it up in answering https://physics.stackexchange.com/questions/8827/question-on-the-stability-of-the-solar-system/161973#161973 on Physics SE.
If you want to see what the current state of the art on solar system simulations is you could do worse than watch Sean Raymond's presentation at "Protostars and Planets VI" from 2013. You can find the actual write up here. Or from the same conference there is Melvyn Davies' review of the long-term dynamics of planetary systems. The talk can be seen here. This review does contain the sort of information you are looking for. It discusses the past and future evolution of our solar system, as well as planetary systems in general. It presents and reviews simulations and discusses the relevant issues. Both of these guys are excellent speakers.
A brief summary would be that the solar system is probably stable for the remaining lifetime of the Sun. However, there is the intriguing possibility that Mercury could fall into the Sun or collide with Venus in the next billion years or that Mars could be ejected from the solar system on a similar timescale (e.g. from the N-body simulations of Battygin & Laughlin 2008).